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Finding the Fourth Proportional to 235,435.69, 353,375.48 and 85,820.59

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Solution

The fourth proportional to 235,435.69, 353,375.48 and 85,820.59 is: 128,811.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,435.69 : 353,375.48 = 85,820.59 : x
  2. Step 2: Convert to fraction form
    235,435.69/353,375.48 = 85,820.59/x
  3. Step 3: Cross multiply
    235,435.69x = 353,375.48 × 85,820.59
  4. Step 4: Simplify right side
    235,435.69x = 30,326,891,756.03
  5. Step 5: Solve for x
    x = 30,326,891,756.03/235,435.69
  6. Step 6: Final answer
    x = 128,811.79

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.